<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.title {
				width: 200px;
				font-size: 0;
				height: 200px;
				background: red;
			}

			.title .content img {
				width: 50px;
				height: 50px;
			}
			/*--主要的--*/
			.content {
				display: inline-block;
				vertical-align: middle;
			}

			.flag {
				display: inline-block;
				vertical-align: middle;
				height: 100%;
				width: 0;
			}
		</style>
	</head>
	<body>
		<div class="title">
			<div class="flag"></div>
			<div class="content">
				<img src="img/add.svg">
			</div>
		</div>
	</body>
</html>
